Revert "Merge branch 'ethtool-mac-merge'"

This reverts commit 0ad999c1, reversing
changes made to e38553bd.

It was not intended for net.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

net/ethtool/netlink.h

@@ -111,32 +111,6 @@ static inline void ethnl_update_u8(u8 *dst, const struct nlattr *attr,
 	*mod = true;
 }
 
-/**
- * ethnl_update_bool() - update bool from NLA_U8 attribute
- * @dst:  value to update
- * @attr: netlink attribute with new value or null
- * @mod:  pointer to bool for modification tracking
- *
- * Use the u8 value from NLA_U8 netlink attribute @attr to set bool variable
- * pointed to by @dst to false (if zero) or 1 (if not); do nothing if @attr is
- * null. Bool pointed to by @mod is set to true if this function changed the
- * logical value of *dst, otherwise it is left as is.
- */
-static inline void ethnl_update_bool(bool *dst, const struct nlattr *attr,
-				     bool *mod)
-{
-	u8 val;
-
-	if (!attr)
-		return;
-	val = !!nla_get_u8(attr);
-	if (*dst == val)
-		return;
-
-	*dst = val;
-	*mod = true;
-}
-
 /**
  * ethnl_update_bool32() - update u32 used as bool from NLA_U8 attribute
  * @dst:  value to update